The library is well documented. I'm not sure what you expect. If you get to a point where you need something like this you should know enough to make sense of such a reference.
They list the API functions and show how to use it. They even give examples.
The library is being loaded using Resources:LoadLibrary which is deprecated and has been removed a year ago.
https://devforum.roblox.com/t/loadlibrary-is-going-to-be-removed-on-february-3rd/382516
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…